emirge_makedb.py add regex to allow for Silva SSURef_N[Rr]99_tax...

[mlhoggard]

Hi there,

I'm new to using EMIRGE, and not sure if this is still supported, but running emirge_makedb.py I ran into the issue that it was by default expecting the SILVA file to be ...SSURef_Nr99_tax..., whereas in the current version it is ...SSURef_NR99_tax....

I modified the code to simply search for NR, and it appears to have run as expected, but perhaps it could be good to add a regex in there to search for either NR or Nr.

Cheers,
Mike.